28450139402 has 16 divisors (see below), whose sum is σ = 44935862400. Its totient is φ = 13472004960.

The previous prime is 28450139297. The next prime is 28450139453. The reversal of 28450139402 is 20493105482.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1499 + ... + 238542.

It is an arithmetic number, because the mean of its divisors is an integer number (2808491400).

Almost surely, 2^28450139402 is an apocalyptic number.

28450139402 is a deficient number, since it is larger than the sum of its proper divisors (16485722998).

28450139402 is a wasteful number, since it uses less digits than its factorization.

28450139402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243181.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 28450139402 in words is "twenty-eight billion, four hundred fifty million, one hundred thirty-nine thousand, four hundred two".